Yamaha - Fuel Pressure Regulator Fuel System Component 6CB-13906-01-00. Overview. Fuel pressure issues can be tricky-you'll get hesitation, rough idle, or power drop, but it's not always obvious what's causing it. This regulator is what keeps fuel pressure steady so the engine runs clean and consistent. When it starts to drift out of spec, the motor just doesn't feel right, especially under load. Getting it back in line makes a noticeable difference in how smooth and responsive the engine runs.. Key Features. • Stable Fuel Pressure Control - Maintains consistent pressure for smooth engine operation.. • Improved Engine Performance - Helps eliminate hesitation and uneven throttle response.. • OEM Fit Accuracy - Matches Yamaha factory specs for proper calibration and installation.. • Fuel System Durability - Built to handle constant fuel flow and marine conditions.. Engine & Boat Compatibility. Verify compatibility with your specific Yamaha outboard model and part number before installati